Acids & Bases
||Phosphorus acid, H3PO4, is actually a diprotic
acid; Ka1 = 1.0 X 10-2 and Ka2 = 2.6
X 10-7. What are the values of [H+], pH and HPO32-
in a 1.0 M solution?
||Tellurium, in the same family as sulphur, forms an acid analogous
to sulphuric acid and called telluric acid. It exists, however, as H6TeO6
(which looks like H2TeO4 + 2 H2O). It is
a diprotic acid. Ka1 = 2.1 X 10-8 and Ka2
= 6.5 X 10-12. Calculate [H+], pH, and [H4TeO62-]
in a 0.25 M solution of H6TeO6.
||How many millilitres of 0.05 M phosphoric acid will be required
for reaction with 50 mL of 0.50 M KOH to yield a) KH2PO4,
b) K2HPO4, c) K3PO4?
||Write formulas for the primary, secondary, and tertiary lithium
salts of H3PO4. Write equations for the equilibria present
in an aqueous solution of a) H2SO4, b) H3PO4.